Google will use really specific URL destinations (such as like the one above) to keep track of where the click takes a specific person. I think what he tried to do is this:
1. Google something.
2. Hover over a link.
3. Right click.
4. Copy the URL.
5. Paste the URL.

What people will miss is that when you view where a google search result leads changes when you click on the link. It goes from a normal URL to something like the mess guanyu posted. There are other ways of getting a really long one such as image links that don't like to the source but of google's cache of it.

No I mean, why do Google searches have such long url's? You'd think it would be something simple like the key words you searched or the url of the image you uploaded, but instead you get that giant garbled mess.